I think I'm going to vomit is a message informing you of a symptom of Vomiting in DayZ Standalone (DZSA).
Message
"I think I'm going to vomit"
Status Effect
Cause
Stomach above 3900
Effects
-500 Stomach -600 Energy (minimum of 100) -1000 Water
Cure
Don't eat any more Food
Notes
If ignored/untreated, this effect could lead to Vomiting